GTm Extranet is not a competing portal to MaBoxRH: it is an application component for time and activity management (GTA) hosted within the portal maboxrh.laposte.fr. The confusion between the two generates the majority of connection errors and support tickets to HR. Clarifying their respective functional scopes helps save time on each HR process, whether you are a civil servant, contractor, or on a fixed-term contract.
GTA calculation rules and leave balances: what the portal does not verify for you
The leave balance displayed in the GTm module applies a calculation rule that depends on your assignment entity, not a uniform standard for the entire La Poste Group. An agent assigned to Mail and a collaborator from the Postal Bank may see balances structured differently for the same theoretical entitlement.
A discrepancy between the GTm counter and your personal count does not necessarily indicate a technical error. It may reflect a prorating rule related to your entry date, a change of entity during the year, or a poorly synchronized CET transfer. The module displays a result, not the formula. To verify the applied rule, you must go through your local HR manager.
Before contesting a balance, we recommend consulting the corresponding payslip on MaBoxRH. The “accrued/taken leave” line on the payslip provides an independent point of comparison from the GTA counter. If the two diverge, the HR manager has the correction tools.
To choose between GTM HR and MaBoxRH La Poste wisely, you must first understand that GTm only handles the GTA layer, while MaBoxRH encompasses payroll, personal data, and all administrative processes.
Access to GTm based on status: contractors, fixed-term contracts, and internal mobility
Access to the modules varies based on status, entity, and account opening date. A login path valid for a permanent colleague in Mail is not necessarily valid for a fixed-term employee in the Digital Branch. Rather than replicating a third party’s procedure, always follow the path communicated by your local HR.
After an internal mobility, the GTm account may become dormant. Reactivation does not occur from the MaBoxRH interface itself: it requires intervention from the HR manager of the host entity. The reactivation timeframe depends on the administrative processing of the reassignment in the central HRIS.
Concrete points of vigilance for populations with conditional access:
- Fixed-term employees receive an IDRH (HR identifier) upon hiring, but activation of the GTm module may take several days after the creation of the MaBoxRH account.
- Contractors assigned to certain subsidiaries access a restricted GTA scope: consultation of schedules and balances, without the possibility of directly submitting a leave request online.
- In the event of a change of entity, the transfer of acquired rights (CA, RTT, CET) to the new GTm counter is not automatic and must be manually verified.
Accessibility of the MaBoxRH virtual keyboard: a real selection criterion
Authentication on maboxrh.laposte.fr relies on a virtual keyboard for password entry. This security measure prevents keyloggers from capturing keystrokes, but it poses an accessibility issue for agents using a screen reader.
The MaBoxRH help page documents an audio mode for the virtual keyboard. Before choosing your access path, check that this mode works with your browser/screen reader combination. On certain versions of Firefox with NVDA, audio feedback may not trigger correctly.
The audio virtual keyboard remains the only reliable indicator of the page’s authenticity. A phishing site reproducing the MaBoxRH interface typically does not replicate this audio behavior. If the keyboard produces no sound while the mode is activated, leave the page without entering your credentials.
Electronic payslip: MaBoxRH, not GTm
Consultation and downloading of the payslip are exclusively the responsibility of MaBoxRH. GTm Extranet does not display any payroll documents. This distinction seems obvious to experienced agents, but it regularly traps newcomers who look for their payslip in the GTA module after checking their leave.
The transition to an electronic payslip does not eliminate the employer’s obligation to ensure access to the document. If you cannot find a payslip on MaBoxRH, HR support ([email protected] for the Mail branch) can verify if the document has been generated and deposited in your space.
A often overlooked point: modifiable personal data on MaBoxRH directly feeds into the payslip. An incorrect address or bank details entered in MaBoxRH will reflect on the next payslip. Changes in GTm only affect planning data.
The functional boundary between GTm and MaBoxRH can be summarized by a simple rule: everything related to working time goes through GTm, everything related to payroll and administrative data goes through MaBoxRH. When in doubt about the right module, ask yourself about the type of data concerned rather than searching for a menu in the interface.
If you have doubts about access, the most reliable reflex is to contact your local HR before attempting to connect via a link received by email.
